Furnace



(No MMMM 1.) l i H.` WILLIAMSON.'

FU RRRR E. A y No. 294,556. Patented Mar. 4, 18,84.

A l l l l l Y U U u e ou UNITED STATES PATENT OFFICE.

I-IENRY c. WILLIAMsON, or MICHIGAN Grrr, INDIANA.

FURNACE.

SPIFICATIN forming part of Letters Patent No..29`4,556, dated March 4, 1884.

Application-filed October 30, 1383. (No model.) l

To all whom it may concern.- A

le it known that I, HENRY C. WILLIAM- SON, a citizen of the United States of America, residing at Michigan City, in the county of La Porte and State of Indiana, have invented' certain new and useful Improvements in Fur naces, of which the following is a specifica tion, reference being had therein to the accompanying drawings.

My invention relates to improvements inA The object it has in view is to ob- Like lettersrefer to like parts in eachl View.

In the drawings, A represents the front wall, in which are formed the ordinary fueldoors, B, and ash-pit doors B.

C C are the side walls, and D the rear wall, of the' furnace.

side walls, C, and being operated by a rod, G, which passes out through the front wall'. The object of this damper is to vary` the force of the air-currents on different parts of grate H, as will be understood. The bridge-wall I separates the ash pit F from an additional or auxiliary ash -pit, J. (Shown clearly in Figs. l and 8.) Ash-pit J is covered by a grate, K, and access thereto is gained through openings L, made in the side wall of the furnace. The object of this additional ash-pit and grate is to consume any fuel which may accidentally be forced beyond the maingrate, and by providing means for the admission of air through the openings L combustion is in n creased.

Situated over bridge-wall I, and ashort distance to the rear of the front vedge thereof, Y

is an arch, M, which nearly closes the space between said bridge-wall and the boiler N,

- leaving only an arched passage, 0, between those parts. A passage, c, is formed through the arch M, which communicates with the outer air through a passage, b, formed in the A damper, E, is located in ashpit F, said damper having bearings inv heat and fuel in the f side lwall of'the furnace, and with thevv in'- terior of the furnace through a series of openings, c, made in the front face thereof. The passage a,formed in the arch, decreases gradually in size from the point where it communicates with passage Z, in order that the current of air passing through openings c may be uniform. lIhe passage formed in the side wall, isclosed by a suitable register,whereby the air to be admitted is regulated, and the Vopenings c of arch M are so arranged that the air passing therethrough will be brought in ,direct contact with the gases arising fromthe re bed,'whereby the parts commingle and serve to increase combustion and consume smoke.

To the rear of thel auxiliary ash-pit J there is formed a floor of masonry, l?, as shown in Fig.`1. As shown in that figure, this masonry from the additional grate takes an abrupt turn upward, and thenv is built on a gradual incline to the rear wall of the furnace, whereby the space between it and the boiler through which the currents escape to the flues gradually diminishes in size.

By the arrangement and construction of the parts, as hereinbefore described, the gases arising from the fire-bed are thoroughly commingled withy the air-currents and thoroughly heated and consumed, whereby the waste of form of smoke is greatly lessened.

WhatI claim is- 1. The damper E, situated in ash pit F,

openings c, and communicating with the outer air, as and for the purpose set forth.

2. The combination of damper E, arch M,

provided with passage a and openings c, and

communicating with the outer air, and auxiliary ash-pit J and grate K, as and for the purpose set forth.

3. The combination of damper E, arch M, constructed as described, auxiliary ashpit J and grate K, and inclined floor I), as and for the purpose set forth.

In testimony whereof I affix my signature in presence of two witnesses.

. HENRY C. VVILLIAMSON.

Witnesses:

JARED H. ORR, J. A. THORNTON.

IOO 

